Merge pull request #8113 from ipfs/feat/key-export-online

feat: allow key export in online mode

core/commands/keystore.go

@@ -12,11 +12,13 @@ import (
 
 	cmds "github.com/ipfs/go-ipfs-cmds"
 	config "github.com/ipfs/go-ipfs-config"
+	keystore "github.com/ipfs/go-ipfs-keystore"
 	oldcmds "github.com/ipfs/go-ipfs/commands"
 	cmdenv "github.com/ipfs/go-ipfs/core/commands/cmdenv"
 	"github.com/ipfs/go-ipfs/core/commands/e"
 	ke "github.com/ipfs/go-ipfs/core/commands/keyencode"
 	fsrepo "github.com/ipfs/go-ipfs/repo/fsrepo"
+	migrations "github.com/ipfs/go-ipfs/repo/fsrepo/migrations"
 	options "github.com/ipfs/interface-go-ipfs-core/options"
 	"github.com/libp2p/go-libp2p-core/crypto"
 	peer "github.com/libp2p/go-libp2p-core/peer"
@@ -150,7 +152,6 @@ path can be specified with '--output=<path>' or '-o=<path>'.
 		cmds.StringOption(outputOptionName, "o", "The path where the output should be stored."),
 	},
 	NoRemote: true,
-	PreRun:   DaemonNotRunning,
 	Run: func(req *cmds.Request, res cmds.ResponseEmitter, env cmds.Environment) error {
 		name := req.Arguments[0]
 
@@ -163,13 +164,24 @@ path can be specified with '--output=<path>' or '-o=<path>'.
 			return err
 		}
 
-		r, err := fsrepo.Open(cfgRoot)
+		// Check repo version, and error out if not matching
+		ver, err := migrations.RepoVersion(cfgRoot)
+		if err != nil {
+			return err
+		}
+		if ver != fsrepo.RepoVersion {
+			return fmt.Errorf("key export expects repo version (%d) but found (%d)", fsrepo.RepoVersion, ver)
+		}
+
+		// Export is read-only: safe to read it without acquiring repo lock
+		// (this makes export work when ipfs daemon is already running)
+		ksp := filepath.Join(cfgRoot, "keystore")
+		ks, err := keystore.NewFSKeystore(ksp)
 		if err != nil {
 			return err
 		}
-		defer r.Close()
 
-		sk, err := r.Keystore().Get(name)
+		sk, err := ks.Get(name)
 		if err != nil {
 			return fmt.Errorf("key with name '%s' doesn't exist", name)
 		}

test/sharness/t0165-keystore.sh

@@ -175,14 +175,25 @@ ipfs key rm key_ed25519
     test_cmp rsa_key_id roundtrip_rsa_key_id
   '
 
-  test_expect_success "online export rsa key" '
-    test_must_fail ipfs key export generated_rsa_key
+  # export works directly on the keystore present in IPFS_PATH
+  test_expect_success "export and import ed25519 key while daemon is running" '
+    edhash=$(ipfs key gen exported_ed25519_key --type=ed25519)
+    echo $edhash > ed25519_key_id
+    ipfs key export exported_ed25519_key &&
+    ipfs key rm exported_ed25519_key &&
+    ipfs key import exported_ed25519_key exported_ed25519_key.key > roundtrip_ed25519_key_id &&
+    test_cmp ed25519_key_id roundtrip_ed25519_key_id
+  '
+
+  test_expect_success "key export over HTTP /api/v0/key/export is not possible" '
+    ipfs key gen nohttpexporttest_key --type=ed25519 &&
+    curl -X POST -sI "http://$API_ADDR/api/v0/key/export&arg=nohttpexporttest_key" | grep -q "^HTTP/1.1 404 Not Found"
   '
 
   test_expect_success "online rotate rsa key" '
     test_must_fail ipfs key rotate
   '
-  
+
   test_kill_ipfs_daemon
 
 }